With the best water cooling reservoir, you can eliminate heat quickly. That’s not all! This device also possesses quality heat transferring abilities. It is an ideal alternative if you are looking to do away with the stock cooler. Unlike the stock coolers, the cooling reservoir doesn’t make unpleasant noise, neither does it need airflow to work.

Another big draw of this cooling tool is its heat efficiency. Whether you work on your PC or game, the cooling reservoir offers you a better experience while removing heat. You can mount these cooling devices at your convenience. As this cooling tool circulates, it enhances the replacement of air bubbles with liquid while holding the extra liquid in a loop.

While some users choose to install it as part of a pump/reservoir combo, others prefer to mount it as a standalone unit. Irrespective of your preferred installation method, you can be sure it would deliver above your expectations. Ensure you build your loop, so the reservoir is always before the pump

However, purchasing the topwater cooling reservoir is a daunting task. This device is available in two major types. Besides the separate models, we also have the combo water cooling tool. So, choosing a suitable cooling device for your workshop might be tricky. Fortunately, this post will help you make the right decision. It reviews the best water cooling reservoir available on the shelves. This post also contains important features of each product as well as the pros and cons.

The Best Water Cooling Reservoirs

XSPC Photon Tube ReservoirCheck Price
EKWB EK-RES X3 250 RGB ReservoirCheck Price
Koolance BDY-TK240X70 Reservoir Body Check Price

XSPC Photon Tube Reservoir

XSPC Photon Tube Reservoir is an excellent tube reservoir for cooling your PC. The manufacturer craft this cooling unit with high-quality glass, which is highly durable. In the center of the tube, there is an acrylic 5mm LED lighting pole attached to the reservoir base. LED can easily get replaced to match the color scheme of your choice. Unlike other reservoirs that use cheap plastic, XSPC Photon features a high-quality aluminum bracket. You will find the bracket at both ends of the reservoir, offering a clear view of the tube. Besides being handcrafted, we also test this product under pressure to ensure reliability.

It has 3x G1/4″ Ports, and its dimensions are 270 x 75 x 75mm.

Pros Cons
LED easy to replace
Color matching scheme
Aluminum bracket
Silent, no leaks, good water flow
Difficult to adjust the fan speed
Big size – check the dimensions before purchase

EKWB EK-RES X3 250 RGB Reservoir

The EK-RES X3 250 RGB is a versatile multiport reservoir. It has a pre-installed 4-pin 12V RGB LED stripe compatible with every major motherboard manufacturer and a mainstream RGB controller. Also, it is a cylindrical standalone option, manufactured from premium quality 60mm acrylic tube. It features POM Acetal end caps in black color. Quality EPDM rubber washers ensure an airtight sealing at both ends of the reservoir. Also, the reservoir has six G1/4″ ports, filling the tube routing and draining, an easy job.

Building a loop with this reservoir is quite simple due to:

  1. the number of inlet/outlet port configuration options
  2. the simple and effective mounting kit

The characteristics of this reservoir are: Installation height: 250mm – Diameter: 60mm – Capacity: ~440ml

It is advisable to be careful when cleaning the acrylic reservoir. Alcohol derivatives or other solvents might cause cracks.

Please note the following instructions from the manufacturer:

  1. With ports #3, #4, or #6, you should use the enclosed EK-Extender G1/4″ due to the ports recessed into the plastic Reservoir Bottom.
  2. Be patient with EK-Extender G1/4. Make sure not to use fittings or barbs with G1/4″ thread longer than 5mm!
  3. With ports #1 and #2, ensure not to use fittings or barbs with a diameter larger than 25mm!
  4. You should only use port #6 of the EK-RES X3 series reservoir to connect this reservoir with an external fill port.
Pros Cons
Numerous ports
Easy to build the loop
You need to be careful with threads and fittings
Non-standard connectors at the bottom

Koolance BDY – TK 240X70 Reservoir Body

Koolance offers reservoir bodies for the expansion or replacement of your current reservoir. Each acrylic tube can be easily adapted to satisfy all water-cooling needs. You can mount it and use it both horizontally or vertically.

The inside of the tube is equipped with a fin to eliminate vortexing in the reservoir. You have two options for the installation of fittings: At the side or the lower end. The vacant connection threads can be sealed with the included screw plugs.

The optional top and bottom expansion are made from sturdy Acetal. The top piece is also equipped with an opening which is especially interesting for the integration of fillports. You can disassemble the whole reservoir for easy cleaning.

All connection threads on the expansion pieces are 1/4″ threads for maximum compatibility. With an expansion piece, two tubes can get connected.

The specifications are: Length: 240mm – Diameter: 80mm – Capacity: 924ml

You can use the Koolance BDY-TK240x70 reservoir Body drawing to help in deciding the reservoir to best suit your water cooling reservoir needs.

Pros Cons
Available for expansion or replacement of the reservoir
Acrylic tube, capacity: approx. 924ml
Can be mounted horizontally or vertically
Can be mounted horizontally or vertically
The guarantee is valid only if operated with distilled water or with water additives and/or finished mixtures of specific manufacturers
You need to be careful with installation and fittings

Pump Reservoir Combo

You can choose to buy the components separately or purchase the Pump/Reservoir Combo. It comes down to your personal preference and an assessment of your individual needs.

The Reservoir – Pump Combo is a straightforward and safe option. The coolant and the pump will work together without any problems. In the market, you can find several Combo options incorporating the cylindrical reservoir. There is also the option of the ‘Bay’ Pump Reservoir Combo, which we will not discuss as it is gradually becoming redundant.

With the classic cylindrical reservoirs, placing the reservoir on top of the pump becomes easy so that coolant is always available. In case the pump functions dry, it could get ruined. Check for the size that fits your requirements and makes sure the combo unit has the proper mounting equipment.

A Pump Reservoir Combo Unit usually shares the same mounting apparatus. Regarding separate solutions, both the pump and reservoir need their separate installation equipment.

As far as reservoirs are concerned – both standalone or combo – it is best that you chose a model that has an anti-cyclone solution.

The anti-cyclone insert is important so that you don’t get the “tornado” effect in the reservoir, resulting in air being sucked through the loop and creating problems in the water blocks and radiators. Also, you can find our related article about the best water cooling pumps if you decided to install water cooling separately.

You don’t determine the reservoir’s performance by the use of either a combo or separates. The main criteria would have to be

  1. What works best for your PC;
  2. The visual outcome of your desire.

Thermaltake Pacific DIY LCS PR 22 D5 Reservoir – Pump Combo

The Thermaltake Pacific PR Series tube reservoir and D5 pump enable you to customize your PC water cooling configurations. This combo offers both reliability and outstanding performance. It is manufactured from high-quality POM and PMMA material to provide a crystal clear, high performance, robust solution.

As a result, it is an exceptional choice for PC users offering supreme mounting, fitting and flow.  It comes with two capacity options: 200ml or 300ml.

The main features of the Thermaltake Pacific DIY LCS PR 22 D5 Reservoir – Pump Combo is:

  1. Strong Performance. Made in Taiwan, the top cap supports rubber washers for a proper seal, including two predrilled G1/4” ports for fittings. Featuring 6mm thick of the pipe wall, it can sustain the maximum pressure up to 99 PSI. You can easily open out the top cap to clean the reservoir.
  2. Heat-resistant Acrylic Tank. The Pacific PR Series tube reservoirs are all made of reliable, light POM and PMMA construction – crystal clear and highly durable. The tube is made from high-quality acrylic with a maximum working temperature: 131℉(55℃).
  3. Easy and Flexible Application. Along with two brackets connected to both ends, Pacific PR Series is solid hold inside the chassis and allows you to build an exquisite cooling system with upgrade options. You can install it either horizontally or vertically.
  4. Ultimate Speed Controller and High-lift Pumping. This combo is designed with a manual speed control knob to provide five speeds. Maximum discharge up to 1135L/hr provides high-performance cooling to your components. High-lift pumping of the pump head reaches up to 15 feet high at the maximum speed.
  5. The pump is compatible with Thermaltake Pacific Series reservoirs and fittings, giving you the option to increase the performance of the system.
Pros Cons
Sustains the maximum pressure up to 99 PSI
The Manual speed control knob
Silent Kit pump cover
Capacity: 200ml or 300 ml
Easy installation
Maximum discharge is 1135 l/hr
Multiple mounting options
Maximum working temperature is lower compared to other pumps (55°C)
Coolant might fade over time
Certain caution measures are to be followed, such as:

  • using pre-mix coolant,
  • filling the reservoir from the top

XSPC D5 Photon Reservoir/Pump Combo V2

The XSPC D5 Photon Reservoir/Pump Combo combines the ultimate tube reservoir with the best pump available for PC water cooling.

The D5 Vario pump features superior performance and reliability. The speed dial allows you to adjust the speed according to the requirements of your system, and the tacho output lets you accurately monitor the pump’s speed.

The tube is made of high-quality glass which is exceptionally durable. In the center of the tube, there is an acrylic 5mm LED lighting pole attached to the base of the reservoir. LED can easily get replaced to match the color scheme of your choice. Unlike other reservoirs that use cheap plastic, XSPC Photon features a high-quality aluminum bracket. The bracket is connected at both ends of the reservoir offering a clear view of the tube. Each reservoir is handcrafted and is tested under pressure to confirm reliability.

V2 Photon reservoirs include a new bracket which attaches directly to 120mm and 140mm radiators. It also has an improved fill port with lower restriction, to make filling the reservoir easier. Photon reservoirs can be used either horizontally or vertically. If using the Photon horizontally, make sure to keep it topped up to the top so that air doesn’t get sucked into the loop.

Pros Cons
LED easy to replace
Color matching scheme
Aluminum bracket
Silent, no leaks, good water flow
Difficult to adjust the fan speed
Big size – check the dimensions before purchase
No vertical stand


EK-XRES 140 Revo D5 PWM is a high-performance water-cooling pump with an integrated reservoir. The core of the unit is the Xylem D5 PWM water pump.

The EK-XRES Revo D5 series comes with a rounded design that offers great usability and allows installation at any angle within 360° of rotation. The special rubber shock absorber is used to de-couple the main pump body from the mounting clip for silent operation, free of vibration noise. Horizontal and vertical positioning is supported to enable more tube routing options.

EK-XRES 140 Revo D5 series reservoirs come preinstalled with an anti-cyclone insert. This water pump/reservoir combo unit can be mounted directly on computer chassis using the enclosed Revo D5 Holder.

The tube is made of quality acrylic material, and the reservoir bottom/pump top is made of quality POM Acetal material. This reservoir can get upgraded with longer acrylic tubes used by EK-RES X3 series reservoirs.

A significant benefit of EK-XRES 140 water cooling pump is its compatibility with RGB sync technologies from all the major motherboard manufacturers.

If you are looking for an advanced and easy to use water cooling pump, this is the pump that will fulfil your requirements.

Pros Cons
Instructions are clear and easy to follow – come with all the tools and hardware needed
The pump offers increased hydraulic performance
Comes with 2 options for vibration dampening
Well polished with bright lighting
Can get easily disassembled for cleaning/flushing
Maximum liquid temperature is 60°C
Silent even at maximum flow
No leaks
The pump is water lubricant – it is advisable not to run it dry
The pump bracket is not included in the unit
The RGB power cable is not very long; buy an RGBW extension if your pump isn’t near your motherboard.
No independent drain port built into the pump

Nowadays PC users often need to cool their PC hardware to keep it functioning properly and avoid a crash. Several water-cooling options are now available, either as stand-alone pumps and reservoirs or as combo units. Both options have their advantages and disadvantages. In terms of performance, there is no black or white answer. It depends on your aesthetics and your personal preferences, both technical and visual. In this article, I presented in detail numerous water cooling options and offered you all the information you need to make the right decision. Feel free to send me your comments below and share your views and experiences.

Things To Consider Before Buying A Water Cooling Reservoir

Do you know having the best water cooling reservoir help stay safe from dehydration?

Likewise, having a bad product comes with consequences. With varieties of products in the market today, shopping for a good model can be difficult. However, this review comes with a solution. Below are the necessary things to consider before purchasing a water cooling reservoir.

Reservoir Size

One of the essential factors to consider when choosing the right water cooling reservoir is the reservoir size. There are have been different perspectives concerning the importance of reservoir size. Without any doubt, considering the device’s capacity help, you make the right decision.

It would be best if you considered your workspace before purchasing the cooling unit. If you have enough space to mount huge liquid cooling, you can buy one. However, if the space is limited, you need to opt-in for a compact cooling reservoir.Many users consider a huge water cooling reservoir as a better option for water cooling. If you are looking to purchase an efficient cooling unit, we recommend a bigger water cooling reservoir.

Flow Rate

Like the reservoir size, you should also consider the flow rate of the cooling unit. Ensure you choose the reservoir ideal for your work. Unlike other cooling tools, reservoir flow rate calculations are in liters.

Irrespective of your framework, you should never purchase a reservoir that delivers less than 500 L/ h. If possible, you should buy a reservoir with a 1000 L flow rate or more. Such a device ensures that less heat and faster cooling time.

Cooling Temperature

The cooling temperature is an important factor to consider before shopping. Prototypes come with different temperature options. Models with freestanding top-mount tend to chill water more than bottom-mount design. Closer attention to this will help make a regret-free temperature choice.


This factor might seem unnecessary, but it is as important as any other factors to consider. Water cooling reservoirs are known to produce unpleasant noise often. Many associate this downside with all cooling units on the shelves. We are happy to inform you that not all liquid cooling is noisy. There are still a plethora of devices that perform above expectations.

So, how do you recognize these units? Ensure you aren’t buying a cooling reservoir with more than 25 dB for optimal noise. If possible, you should


Our list of important factors to consider when choosing the best water cooling reservoir is incomplete without a budget. Before you proceed to buy liquid cooling, you must have a monetary arrangement. You should buy a budget-friendly and cost-saving cooling device. With that, you don’t have to break your bank to prolong your PC’s lifespan.


Which Water Cooling Reservoir is the Best?

Irrespective of how you search it, you would always find XSPC Photon Tube Reservoir on the best reservoir combo 2021. One bright side of this tube is its durability feature. Unlike other cooling kits, this model is built to last for years. Also, it features an acrylic 5mm LED lighting pole which you can replace effortlessly. The manufacturer builds this model to ensure that you can replace the LED with the right color scheme.

Also, this model stays ahead of its competitors with its superior-quality aluminum bracket. Don’t forget this water cooling reservoir produces no unpleasant noise irrespective of the installed location. XSPC designs this model to be leak-free and supply quality water flow. However, it is important to know that this model is available in big size. It is an ideal model for users who need a big size reservoir for their workshop.

Is Water Cooling Worth it 2021?

Water cooling reservoir is an important tool that ensures your computer and its components last for a long period. Unlike any other cooling device, liquid cooling offers better thermal performance. Irrespective of how long you use your PC, the cooling kit moderates its temperature to perform efficiently.

The water cooling reservoir also adds incredible aesthetics to your workshop look. Also, it reduces clearance issues for RAM. Also, other conditions make the water cooling reservoir an essential tool for your workshop. For instance, if you are working with a high-end desktop processor, there is no way you can do it without liquid cooling. Likewise, your budget and preference also determine if you would get this device. Liquid cooling can be costly. So, you need to be prepared to pay more for this device.

Does Reservoir Size Matters in Water Cooling

The reservoir size is one vital condition to consider when choosing a water cooling reservoir. For instance, some users prefer a large cooling unit to a portable model. If you belong to this school of thought, you need a large space in your workshop to mount the device. If you have limited space, you need a space-saving cooling reservoir.

However, size isn’t an important factor when considering the cooling reservoir performance. Often, there is no reason to install a huge reservoir. By using t-connectors to add fill and drain lines, you can efficiently use portable models. One big draw of large liquid cooling is eliminating the need to top off the loop regularly. Also, these devices are easy to fill.

What is a Reservoir in Water Cooling?

A reservoir in water cooling is a unit that acts as the filling port for liquid coolant. This device is designed to hold extra liquid in a loop. Users install this device to ensure that liquid replaces air bubbles as the loop circulates.

As earlier explained, installing a reservoir in water cooling comes in two major mounting processes. You can choose to install it as a part of a reservoir combo or as a standalone unit.

Is a Bigger Reservoir Better for Water Cooling?

Yes, a bigger reservoir offers better cooling. Unlike the portable cooling units, it takes a larger reservoir short time to cool down and a longer time to warm up. Let’s check it from this point of view. Larger liquid cooling can hold enough water. So, the more water in the reservoir, the larger area to cool. This also means less heat.

However, ensure that your big water cooling reservoir has the surface area you need to keep it off your computers.

Leave a Comment